Improvement in machines foe bounding slate-femes



STINSON HAGAMAN, O'F YVE'ISSPORT, PENNSYLVANIA.

Letters Patent Nio. 78,959, dated June .16, 1858.

IMPROVEMENTN MACHINES FOR -ROUNDING SLATE-FRAMES.

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TO ALL WHOM T MAY CONOERN:

Be it lcnownthat I, STINSDN HAGAMAN, ot" Weissport, in the county orCarhon, and State of Pennsylvania, have invented aunew and improved llfl'achine for Rounding and Finishing the Corners of School-Slate Frames; and I do hereby declare that the following is a full, clear, and e'xaet description thereof", which will -ena-blc others skilled. in the art to make and use the s:1.ne,rei`erence being had to the accornpanying` drawings, forming part of this specification, in whichi d A Figure 1 represents a top view-of my improved machine.

Figure 2, aside elevation ofthe same.

Figure 3, a detached view of the working parts.

Figure 4, the cutter.

`This invention relatesto a machine for linishing the edges and corners ofschool-slate frames in an expeditious and handsome manner, and contains a horizontal revolving cutter fastenedon the upper extremity of a vertical shaft, `against one side of which cutter the edges of' the slate-framemay be jointed or finished, whilst the corners are rounded on the other, thereby enabling two persons to work upon the machine at the same time.

This invention consists also in a press, containing a lever and two revolving bolts or centres to hold the corner ofthe slnte-t`ram-e rmly, whilst it is gently turned from left to right, causing the frame to come in ciontact with the revolving cutter. y

There is connected Vwith this press an ingeniously-eonstracted gauge, to stop the slate-frame, so that the revolving bolts or centres may fasten it at the :desired place or point.

A represents a rectangular or other frame, made of wood, or other suitable material, ot' sufficient strength to hold and support the workingparts of this machine.

B is anupright shaft, 4having itsibearings in A, upon which is the pulley C, over which a belt passes to impart motion to the cutter D. 4 i

E is a bed-plate of iron, (or any other suitable materiah) in which are held two revolving bolts or centres, o o, which are vertically opposite. The lower end of the one underneath restsl upon the set-screw F, that the top or face of it may be veryaccurately adjusted a littlc above the upper surface of the bed-plate E, that the corner of the slate-frame may rest upon-it. v

The upper one isz-pressed down upon the slate-frame by the lever F, thereby forming a very secure fastening to hold the corner ot' the `frame, whilst'it is turned about one-fifth et' a circle, bringing it at the same time in Contact with the revolving cutter, which rounds it oft` very nicely.

On this bolt there is a loose collar, set-scr`ewl,iand small coiled-wire spring, to raise it when the lever is released, that the corner ofthe slate-frame-may be easily inserted between the face or head of each bolt o o.

The peg S, that supports the lower bolt or centre and set-screw, is screwed in the bed-plate E, that it may be removed; otherwise, the bolts onceiitres cannot be inserted in their proper places.

The edges of the cutter D may be straight, concave, or convex, to finish the frames, as desired.

G reprcsents agauge, made of w'ood or any other suitable material, on and'against which the slate-frames slide when their edges arcjointed or finished. This gauge may be adjustable to the cutter as desired.

H is a rocking-tree, I a connecting-rod, and J a short lever, which serves as a gauge to stop the slates nl? the desired point to he fastened by the press.

This gauge is automatic, or operated by the moving ofthe slatc-fraiiie.

When the corner of the frame is inserted between the bolts or centres, the edge willcome in contact with a pin in one arm ofthe rocking-tree H, holding it even or u'sh with the projection on the bed-plate at e, which raises the end of the short lever J above the bed-plate to stop the slate at the desired place'or point, ready for fastening by thc press; When the slate is turned, it relieves the rocking-tree, and causes the lever Jto descend below thcsurface .of the bed-plate, and the pin in the rocking-tree to swing to the right, orinside the projection on the bed-plate at e. d I

I will explain the difference between it and the one owned by J. W. Sayre decidedly-superior, and that there is no interference between them. can operate on it at the same time.

Haring described my, .maohine, *ami Alexander S.'Shull, showing that it is First,ts superior, because it works on a Vertical shaft. As two persons therefore twice theameunt of work can be realized;

Second, because I dispense with any Vibrating-frame w them therein, which is all they claim.

Third, becausefI have no vibrating-frame to operate or weight to raise, merely to turn the slate'.

Fourth, because the slates will be h'eld more firmly, asthe press fastens the frame close, by the 4point ofl contact with the cutter; and, as the press can be operated by the foot, all the power canl be applied that' is necessary, which is a very-essential requirement, as nt least five per cent., in my judgment, of the slate-frames are spoiled in rounding the corners with the vibrating-frame, in consequence of their not beingheld firmly when in contact with the cutter.

What I claim as my invention, Aand desire to secure by Letters Patent, is-

The boltsor centres O O and lever F, in combination with the rocking-tree J, all operating substantially as described, and for the purpose specified.

hatever, in which the slate is laid, and clamp' to hohl H, connecting-rod I, and Ier'er STINSGN HAGAMAN.

' Witnesses:

ROBT PRINCE, F. G. HAGAMAN. 

